Valve



{No Model.)

'W. R. PARK 8: B. T. WILLISTONI VALVE.

- No. 587,855. Patented Aug. 10, 1897.

JOE/w UNITED STATES PATENT OFFICE.

. WILLIAM R. PARK, OF TAUNTON, AND BELVIN T. WILLISTON, OF SOMER- VILLE,MASSACHUSETTS, ASSIGNOR S TO THE HANCOCK INSPIRATOR COMPANY, OF BOSTON,MASSACHUSETTS.

VALVE.

SPECIFICATION forming part of Letters Patent No. 587,855, dated. August10, 1897. Application filed July 28, 1896. Serial'llm' 600,810. (Nomodel.)

Todll whom it may concern.-

Be itknown that we, WILLIAM R. PARK, residing at Taunton, in the countyof Bristol,

and BELVIN T. WILLISTON, residing at S0merville, in the county ofMiddlesex, State of Massachusetts,- have invented an Improvement inValves, of which the following-description, in connection with theaccompanying drawings, is a specification, like letters on on thedrawingsrepresenting like parts.

This invention relates to an improvement in valves, and has for itsobject to provide a valve which is detachably secured to its stem in amanner as will be described, so that the valve is free to adapt itselfto irregularities in its seat and yet is so attached to its stem that itmay be ground while on the stem.

f In accordance with this invention the valve is attached to its stem bymovement of one part laterally with relation to the other part, and athesaid parts when in alinement with eachother are locked against lateralmovement by an intermediate device, as will be described. These andother features of this invention will be pointed out in the claims atthe end of this specification.

Figure 1 represents in elevation a valve and its stem embodying thisinvention. Fig.

2 is a longitudinal sectionof the valve and its stem shown in Fig. 1;Fig. 3, a perspective of the valve, intermediate device, and stemseparated; and Fig. 4, a modification to be referred to. 7

Referring to the drawings, A represents a valve, and, A a stem to whichthe valve is detachably secured by an intermediate device, preferably ofthe construction herein shown.

The intermediate device referred to may and preferably will be made inthe form of an internally-threaded nut a, which is adapted to engage athreaded stud or projection a, on the back face of the valve A. The nuta isproyided with substantially diametrically opposite arms orlugs I)Z), havingin ardly-projectin g flanges b-'-b ,forminglocking-fingerwhich are adapted to fit over projections 12' b on the reduced portionor end I) of the valve-stem. The projections 12 b may and preferablywill be'integral with the valve-stem A, and may jections b b on thestem, so that the stem may be disconnected from the valve, and viceversa, when the stem is permitted to be moved laterally.

The nut 11, provided with the arms b I), hav-' ing the inwardly-projectin g flanges or fingers, forms one form of intermediate device bywhich the valve is attached to the valve-stem, and the said valve andstem may be locked against lateral movement, one with relation'st-antially equal to the thickness of the pro to the other, byproviding the flanges b b on their under side with substantiallycircular recesses b b for the reception of the projections b b on thevalve-stem, in which recesses the' said projections are retained by thesaid nut on the stud a, so as to force the projections b bf'into saidrecesses and into the position shown in Fig.2. When the stud a occupiesthe position shown in Fig. 2, its upper surface is above the lower-edgeof the side walls of the recesses 12 bi'andconsequently the valve-stemcannot be moved laterally to disconnect it from the valve, and viceversa, until the nut is turned, (the valve being held stationary,) so asto carry the nut onthe stud a away-from the valve a sufficient distanceto permit the projections b 12 to pass under the side walls of therecesses 12 b. When the parts occupy the position shown in Figs.

1 and 2, the valve is securely attached to its valve-stem, but theattach mentis sufliciently loose to permit the valve to wabble andthereby adjust itself to irregularities on its seat.

As shown in Figs. 1, 2, and .3, the flanges I) b on the stem are locateddiametrically 0pposite, and the reduced portion b of the stem is of alength greater than the width of the slot or passage-way between thelocking-fingers 11 b but we do not desire to limit our inventionin thisrespect, as the reduced portionl) of the valve may be made of adiammeans of the stud a on the valve byturning too - scribed.

eter or width less than the width of the slot between the fingersb If,and the flanges Z) b may be united and made in the form of a dislcf onthe end of the valve-stem, as shown in Fig. i.

lVe ela-im 1. The combination with ai'aTve provided with a stud, avalve-stem provided with a Web having lateral projections, and a nuthaving separated arms provided with fingers forming a passage into whichthe said web is introduced laterally, and passage-ways for the receptionof the lateral projections on the stem, and means to confine saidprojections in their passage-ways,substantially as de- The combinationof a valve having a threaded stud, a nut to engage said, stud,

arms on said nut located substantially opposite and provided withflanges extended to- 20 ward each other to form a passage, and providedon their undersides with recesseshaving end walls, a valve-stem providedwith a web adapted to pass between the said flanges,

and lateral projections on said web adaped 25

